UFC 4-159-03
3 October 2005
Table 8-4. Environmental Forces
Condition
Load (Metric)
Load (US)
Comments
Transverse Wind
374 kips
Single DD
1663.8 kN
Longitudinal Wind
57.82 kips
963
257 kN
Wind-Yaw Moment
26531 ft-kips
35972 m-kN
Transverse Current
23.4 kips
104.2 kN
Longitudinal Current
0.56 kips
2.5 kN
Current Yaw Moment
863.1 ft-kips
1216 m-kN
Transverse Wind
447.4 kips
4 ea DD 963
1989.9 kN
Longitudinal Wind
231.3 kips
1028.7 kN
Wind-Yaw Moment
47643 ft-kips
64595 m-kN
Transverse Current
42.8 kips
190.6 kN
Longitudinal Current
2.2 kips
9.8 kN
Current Yaw Moment
2372.7 ft-kips
3342 m-kN
8-4.5
method to safely moor the nest of ships. The soils at the site are soft harbor mud of
depths between 50 to 80 feet (15 to 24 meters), so a chain catenary will form below the
seafloor (in the mud) as well as in the water column, as illustrated in Figure 6-6 (Section
6-10). A horizontal distance of 100 feet (30 meters) between the anchor location and
the chain daylight location (point where the anchor leg chain exits the seafloor) is
estimated based on Chain Soil Analysis Program (CSAP) modeling of the chain
catenary in the soil and in the water column.
170
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